Behaviour of Concrete Beams Reinforced with Hybrid Fiber Reinforced Bars

Elsayed, Tarek; Eldaly, A. M.; El-Hefnawy, A. A.; Ghanem, Gouda M.

doi:10.1163/092430410x547074

Cited by 30 publications

(15 citation statements)

References 1 publication

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“…Those anchorage systems are characterized by small elements attached to the surface of FRP bar. [127][128][129][130] To facilitate the ease of description, these elements are hereinafter referred to as the additional ribs anchorage system. Generally, the additional ribs-bar interface has a remarkable greater bond stress than that of the concrete-bar interface or adhesive-bar interface.…”

Section: Additional Ribs Anchorage Systemsmentioning

confidence: 99%

Anchorage systems for reinforced concrete structures strengthened with fiber-reinforced polymer composites: State-of-the-art review

Wang

Zhu

Zhang

et al. 2020

Journal of Reinforced Plastics and Composites

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Fiber-reinforced polymer (FRP) composites have been widely used to strengthen the deteriorated reinforced concrete structures due to their outstanding characteristics of light weight, high strength, as well as noncorrosion. A successful strengthening with the FRP composites would equip the existing structures with the prominent improvement in terms of the durability, ductility, and bearing capacity. Current studies indicate that a simple and reliable anchorage system for the FRP composites will help improve the performance of the strengthened structures both efficiently and economically. Up till now, various anchorage systems have been developed for the FRP composites. Therefore, it is necessary to select appropriate anchorage systems according to different needs and establish relevant design specifications. In view of the aforementioned objectives, this paper systematically summarizes the anchoring mechanism of anchorage systems for two commonly used FRP products (FRP laminates and FRP bars) in different strengthened systems. Additionally, a state-of-the-art review as well as the advantages and disadvantages of each anchorage system are presented. Finally, shortcomings in the current state of knowledge and recommendations beneficial to further study are put forward.

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Section: Additional Ribs Anchorage Systemsmentioning

confidence: 99%

Anchorage systems for reinforced concrete structures strengthened with fiber-reinforced polymer composites: State-of-the-art review

Wang

Zhu

Zhang

et al. 2020

Journal of Reinforced Plastics and Composites

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“…in comparison with metal fittings [14][15][16][17][18]. Therefore, issues related to the improvement of technology and equipment for its manufacture are relevant for the construction industry [19][20][21][22][23][24]. So, changes in the part of the technological process can increase the productivity of production, reduce the costs of constituent components and energy for the production of fiberglass reinforcement.…”

Section: Timelinessmentioning

confidence: 99%

Optimization of Production Lines and Cross-sections of Fiberglass Rebar

Maksimov

Dildin

Maksimova

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Strength and deformability of concrete beams reinforced by non-metallic fiber and composite rebar K L Kudyakov, V S Plevkov and A V Nevskii -Determining reinforcement coverage using an electromagnetic rebar detector P Cikrle, O Anton, A Kinclova et al. Abstract. The article substantiates the need of the construction industry in new lightweight and durable materials that ensure reduction in the cost of work and increase in the operational characteristics of the constructed facilities. These materials include fiberglass reinforcement which is an auxiliary bar made of heavy-duty glass fibers impregnated with a polymer adhesive composition and additionally entwined to create a ribbed surface and tight fit with fiberglass threads. This fitting has undeniable advantages in comparison with steel fittings. The polymer composite is resistant to corroding medium, does not corrode, does not conduct electricity, has high elastic properties, low thermal conductivity, increased tensile strength, etc. It is shown that the issues related to the improvement of technology and the form of a fiberglass rebar section are relevant for the construction industry. So, in particular, the presented developments will significantly reduce the consumption of adhesive composition for impregnating roving threads, reduce production costs by eliminating the loss of adhesive composition in impregnating vessels and pull-guide rollers, increasing the environmental friendliness of production and increasing the line productivity. In addition, it is possible to improve the strength characteristics by optimizing the cross-section and longitudinal cross-sections of the resulting fiberglass reinforcement. The presented changes in the design and technology of fiberglass reinforcement production can be realized as a separate independent module. It is easy to integrate into existing lines during repair work or routine maintenance of equipment.

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“…Therefore, their use in the form of FRP bars as a replacement of conventional reinforcement for reinforced concrete (RC) structures has become attractive. In addition, these materials are unaffected by electrochemical deterioration [9,10].…”

Section: Introductionmentioning

confidence: 99%

Post-Fire Characteristics of Concrete Beams Reinforced with Hybrid FRP Bars

Protchenko

Szmigiera

2020

Materials

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One of the main concerns of experimental and numerical investigations regarding the behavior of fiber-reinforced polymer reinforced concrete (FRP-RC) members is their fire resistance to elevated temperatures and structural performance at and after fire exposure. However, the data currently available on the behavior of fiber-reinforced polymer (FRP) reinforced members related to elevated temperatures are scarce, specifically relating to the strength capacity of beams after being subjected to elevated temperatures. This paper investigates the residual strength capacity of beams strengthened internally with various (FRP) reinforcement types after being subjected to high temperatures, reflecting the conditions of a fire. The testing was made for concrete beams reinforced with three different types of FRP bars: (i) basalt-FRP (BFRP), (ii) hybrid FRP with carbon and basalt fibers (HFRP) and (iii) nano-hybrid FRP (nHFRP), with modification of the epoxy matrix of the rebar. Tested beams were first loaded at 50% of their ultimate strength capacity, then unloaded before being heated in a furnace and allowed to cool, and finally reloaded flexurally until failure. The results show an atypical behavior observed for HFRP bars and nHFRP bars reinforced beams, where after a certain temperature threshold the deflection began to decrease. The authors suggest that this phenomenon is connected with the thermal expansion coefficient of the carbon fibers present in HFRP and nHFRP bars and therefore creep can appear in those fibers, which causes an effect of “prestressing” of the beams.

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Behaviour of Concrete Beams Reinforced with Hybrid Fiber Reinforced Bars

Cited by 30 publications

References 1 publication

Anchorage systems for reinforced concrete structures strengthened with fiber-reinforced polymer composites: State-of-the-art review

Anchorage systems for reinforced concrete structures strengthened with fiber-reinforced polymer composites: State-of-the-art review

Optimization of Production Lines and Cross-sections of Fiberglass Rebar

Post-Fire Characteristics of Concrete Beams Reinforced with Hybrid FRP Bars

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